Yes, you can absolutely be an amazing teacher. I've been a drill sergeant in the United States Air Force for the past 3 years, literally teaching a group of 120 people at a time how to lace their boots, make their beds, execute drill movements, how to wear their uniforms, recognize different rank insignia, etc. While obviously harder for someone who stutters than someone who's perfectly fluent, there's a lot more that goes into making someone an effective teacher than just the words that come out of their mouth. If it's something you want to pursue in life then do it. Your stutter is only as much of a factor as you make it.